Precursor Deposition and Curing for Repeatable Gap-Fill Layers
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Solution Overview
Problem
Existing vapor phase deposition processes face challenges in achieving repeatability, layer quality, and process speed when depositing materials, particularly in filling recesses, trenches, or gaps in substrates.
Innovation Solution
A system comprising a reaction chamber, precursor source, gas injection system, and curing unit, with controlled temperature zones and various curing methods such as radio frequency, infrared, UV, microwave, and remote plasma sources, is used to deposit and cure precursors on a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vapor phase deposition processes are used, then deposition can be performed, but repeatability, layer quality, and process speed are compromised due to tradeoffs
Solution Approach 1:
The deposition process is divided into separate sequential steps: precursor introduction, condensation/deposition, and curing. This segmentation allows each step to be optimized independently, improving repeatability without sacrificing overall process speed. The precursor is introduced, allowed to condense on the substrate, then cured in a separate step to complete the deposition cycle.
Solution Approach 2:
The process employs periodic cycling between precursor introduction and curing steps. By repeatedly introducing precursor material and then curing it in alternating cycles, the system achieves consistent layer buildup with high repeatability while maintaining efficient process throughput through the periodic nature of the deposition-curing sequence.
2Manufacturing precision
If conventional vapor phase deposition is used, then material can be deposited, but layer quality suffers when filling narrow gaps and recesses
Solution Approach 1:
The precursor is introduced and allowed to condense on the substrate surface before the curing step. This preliminary condensation action ensures that precursor material is properly positioned and distributed in narrow gaps and recesses before the curing process locks it into place, improving layer quality in difficult-to-reach areas.
Solution Approach 2:
The process utilizes phase transition of the precursor from vapor phase to condensed phase on the substrate surface. This phase change allows the precursor to naturally flow into and fill narrow gaps and recesses uniformly, then the curing step stabilizes the material in this improved distribution, achieving high manufacturing precision.
3Productivity
If higher process speed is achieved, then productivity improves, but deposition repeatability and layer quality deteriorate
Solution Approach 1:
The curing unit operates continuously or in overlapping fashion with the precursor introduction cycles. While precursor is being introduced in one area, curing can proceed in another area or simultaneously, maintaining continuous useful action. This eliminates idle time between deposition and curing steps, improving productivity without sacrificing layer quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables repeatable and precise deposition of thin layers with controlled thickness, allowing for efficient filling of narrow gaps and improving layer quality while maintaining process efficiency.
Implementation Method 1
The precursor source comprises a precursor source heater
Implementation Method 2
The gas injection system heater is arranged for heating the gas injection system
Implementation Method 3
the showerhead injector comprises a showerhead injector heater
Implementation Method 4
The reaction chamber comprises a substrate support which in turn comprises a substrate cooling unit
Implementation Method 5
The system further comprises a radio frequency power source which is arranged for generating a radio frequency power waveform
Implementation Method 6
The curing unit comprises an infrared source
Implementation Method 7
The curing unit comprises a UV source
Implementation Method 8
The curing unit comprises a microwave source
Implementation Method 9
The curing unit comprises a remote plasma source
Data Source
AI summary
Systems for depositing materials and related methods are described. The systems allow condensing or depositing a precursor on a substrate, and then curing condensed or deposited precursor to form a layer.